08-05-2012
I don't think you can specify variables in cron like that. You can only specify a few things like SHELL.
Also, what's your window manager? GNOME virally hijacks your file permissions via hooks in PAMD and other things, to control who gets permissions to use devices depending on your graphical login. Ergo you may not have permissions to access your sound device until you do a login, no matter what file permissions your sound devices are set to or what groups you belong to. (Or be given permissions without the proper groups or access, for that matter!)
Also, DISPLAY is not needed to play music. Specify -vo null so mplayer doesn't try to open one anyway and die when it can't get into your X context.
Last edited by Corona688; 08-05-2012 at 06:22 PM..
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ALARM(3) BSD Library Functions Manual ALARM(3)
NAME
alarm -- set signal timer alarm
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <unistd.h>
unsigned
alarm(unsigned seconds);
DESCRIPTION
This interface is made obsolete by setitimer(2).
The alarm() function sets a timer to deliver the signal SIGALRM to the calling process after the specified number of seconds. If an alarm
has already been set with alarm() but has not been delivered, another call to alarm() will supersede the prior call. The request alarm(0)
voids the current alarm and the signal SIGALRM will not be delivered.
Due to setitimer(2) restriction the maximum number of seconds allowed is 100000000.
RETURN VALUES
The return value of alarm() is the amount of time left on the timer from a previous call to alarm(). If no alarm is currently set, the
return value is 0.
SEE ALSO
setitimer(2), sigaction(2), sigpause(2), sigvec(2), signal(3), sleep(3), ualarm(3), usleep(3)
HISTORY
An alarm() function appeared in Version 7 AT&T UNIX.
BSD
April 19, 1994 BSD